1 /*
2  *  yesno.c -- implements the yes/no box
3  *
4  *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
5  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
6  *
7  *  This program is free software; you can redistribute it and/or
8  *  modify it under the terms of the GNU General Public License
9  *  as published by the Free Software Foundation; either version 2
10  *  of the License, or (at your option) any later version.
11  *
12  *  This program is distributed in the hope that it will be useful,
13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *  GNU General Public License for more details.
16  *
17  *  You should have received a copy of the GNU General Public License
18  *  along with this program; if not, write to the Free Software
19  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20  */
21 
22 #include "dialog.h"
23 
24 /*
25  * Display termination buttons
26  */
27 static void print_buttons(WINDOW * dialog, int height, int width, int selected)
28 {
29 	int x = width / 2 - 10;
30 	int y = height - 2;
31 
32 	print_button(dialog, gettext(" Yes "), y, x, selected == 0);
33 	print_button(dialog, gettext("  No  "), y, x + 13, selected == 1);
34 
35 	wmove(dialog, y, x + 1 + 13 * selected);
36 	wrefresh(dialog);
37 }
38 
39 /*
40  * Display a dialog box with two buttons - Yes and No
41  */
42 int dialog_yesno(const char *title, const char *prompt, int height, int width)
43 {
44 	int i, x, y, key = 0, button = 0;
45 	WINDOW *dialog;
46 
47 do_resize:
48 	if (getmaxy(stdscr) < (height + YESNO_HEIGTH_MIN))
49 		return -ERRDISPLAYTOOSMALL;
50 	if (getmaxx(stdscr) < (width + YESNO_WIDTH_MIN))
51 		return -ERRDISPLAYTOOSMALL;
52 
53 	/* center dialog box on screen */
54 	x = (getmaxx(stdscr) - width) / 2;
55 	y = (getmaxy(stdscr) - height) / 2;
56 
57 	draw_shadow(stdscr, y, x, height, width);
58 
59 	dialog = newwin(height, width, y, x);
60 	keypad(dialog, TRUE);
61 
62 	draw_box(dialog, 0, 0, height, width,
63 		 dlg.dialog.atr, dlg.border.atr);
64 	wattrset(dialog, dlg.border.atr);
65 	mvwaddch(dialog, height - 3, 0, ACS_LTEE);
66 	for (i = 0; i < width - 2; i++)
67 		waddch(dialog, ACS_HLINE);
68 	wattrset(dialog, dlg.dialog.atr);
69 	waddch(dialog, ACS_RTEE);
70 
71 	print_title(dialog, title, width);
72 
73 	wattrset(dialog, dlg.dialog.atr);
74 	print_autowrap(dialog, prompt, width - 2, 1, 3);
75 
76 	print_buttons(dialog, height, width, 0);
77 
78 	while (key != KEY_ESC) {
79 		key = wgetch(dialog);
80 		switch (key) {
81 		case 'Y':
82 		case 'y':
83 			delwin(dialog);
84 			return 0;
85 		case 'N':
86 		case 'n':
87 			delwin(dialog);
88 			return 1;
89 
90 		case TAB:
91 		case KEY_LEFT:
92 		case KEY_RIGHT:
93 			button = ((key == KEY_LEFT ? --button : ++button) < 0) ? 1 : (button > 1 ? 0 : button);
94 
95 			print_buttons(dialog, height, width, button);
96 			wrefresh(dialog);
97 			break;
98 		case ' ':
99 		case '\n':
100 			delwin(dialog);
101 			return button;
102 		case KEY_ESC:
103 			key = on_key_esc(dialog);
104 			break;
105 		case KEY_RESIZE:
106 			delwin(dialog);
107 			on_key_resize();
108 			goto do_resize;
109 		}
110 	}
111 
112 	delwin(dialog);
113 	return key;		/* ESC pressed */
114 }
115